DE3008330A1 - LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES - Google Patents
LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINESInfo
- Publication number
- DE3008330A1 DE3008330A1 DE19803008330 DE3008330A DE3008330A1 DE 3008330 A1 DE3008330 A1 DE 3008330A1 DE 19803008330 DE19803008330 DE 19803008330 DE 3008330 A DE3008330 A DE 3008330A DE 3008330 A1 DE3008330 A1 DE 3008330A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- cooling
- coating
- area
- piston according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/0076—Pistons the inside of the pistons being provided with ribs or fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
- F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
- F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F2200/00—Manufacturing
- F02F2200/04—Forging of engine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/04—Thermal properties
- F05C2251/048—Heat transfer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
KARL SCHMIDT GMBH 04.03.1980KARL SCHMIDT GMBH March 4th, 1980
Christian-Schmidt-Straße 8/12 -DRQ/GKP-Christian-Schmidt-Strasse 8/12 -DRQ / GKP-
7107 Neckarsulm7107 Neckarsulm
Prov. Nr. 85 39 KSProv. No. 85 39 KS
Flüssigkeitsgekuhlter Kolben für BrennkraftmaschinenLiquid-cooled pistons for internal combustion engines
Die Erfindung bezieht sich auf einen gebauten, flüssigkeitsgekühlten Kolben für Brennkraftmaschinen, insbesondere für mxttelschnellaufende Dieselmotoren, dessen Unterteil mit dem aus einem Eisenwerkstoff bestehenden Oberteil über übliche" Mittel verbunden und bei dem auf der Unterseite des Oberteils ein konzentrisch verlaufender, auf der gegenüberliegenden Fläche des Unterteils sich abstützender Ring derart angeordnet ist, daß der Ring sowohl die radiale innere Begrenzung des im Oberteil hinter dem Feuersteg und wenigstens einem Teil der Ringpartie befindlichen zur Verbindungsebene offenen, ringförmigen Kühlkanals bildet als auch einen zentralen, mit dem Kühlkanal über radial angeordnete Kühlmittelbohrungen verbundenen, zur Verbindungsebene offenen Kühlraum im Oberteil einschließt, wobei der Kühlkanal und der Kühlraum über entsprechende, im wesentlichen parallel zur Kolbenlängsachse im Unterteil verlaufende Kühlmittelzu- bzw. -ablaufleitungen mit dem Kühlmittelumlaufsystem in Verbindung stehen.The invention relates to a built, liquid-cooled Pistons for internal combustion engines, in particular for high-speed diesel engines, with its lower part the upper part, which consists of a ferrous material, is connected by conventional means, and the one on the underside of the upper part a concentric one on the opposite one Surface of the lower part of the supporting ring is arranged such that the ring is both the radial inner limitation of the one located in the upper part behind the top land and at least part of the ring belt forms an annular cooling channel that is open to the connecting plane and also a central one with the cooling channel above includes radially arranged coolant bores connected to the connection plane open cooling space in the upper part, wherein the cooling channel and the cooling space via corresponding, essentially parallel to the piston longitudinal axis in the lower part running coolant inlet and outlet lines with the Coolant circulation system are in communication.
Dieser gebaute Kolben wird für höchste Motorleistungen und/oder Schwerölbetrieb eingesetzt. Damit ist eine Kühlung in jedem Fall erforderlich. Sie ist eine Zwangskühlung oder Einspritzkühlung mit Shakerräumen als Standardkonstruktion. Der Öldurchfluß kann radial von außen nach innen oder umgekehrt erfolgen.This built piston is used for maximum engine performance and / or heavy oil operation. So that's a Cooling is required in any case. It is a forced cooling or injection cooling with shaker spaces as Standard construction. The oil flow can be radial from outside to inside or vice versa.
130038/0229 2"130038/0229 2 "
30Q833030Q8330
ty ty
Um die Maße und Gewichte eines solchen gebauten Kolbens möglichst klein zu halten, besteht das Oberteil des Kolbens aus einem wärmebeständigen Eisenwerkstoff, insbesondere Schmiedestahl, und das Unterteil aus einer eutektischen Aluminium-Silizium-Kolbenlegierung oder Eisenlegierung mit Kugelgraphit, wobei die beiden Bauteile durch Zuganker oder Schrauben, durch Löten oder Schweißen miteinander verbunden und im Bereich der Verbindungsebene der Bauteile Kühlräume angeordnet sind, um die im oberen Kolbenbereich anfallende Wärmemenge, die nicht anders abgeleitet werden kann, abzuführen, In order to keep the dimensions and weights of such a built piston as small as possible, the upper part of the piston is made of a heat-resistant iron material, in particular forged steel, and the lower part is made of a eutectic aluminum-silicon piston alloy or iron alloy with spheroidal graphite, the two components being supported by tie rods or Screws, connected to one another by soldering or welding, and cooling spaces are arranged in the area of the connecting plane of the components in order to dissipate the amount of heat that occurs in the upper piston area and cannot be dissipated in any other way ,
In der Regel liegt bei solchen Kolben eine relativ flache Brennraummulde vor, so daß die höchste Bodentemperatur von über im allgemeinen 350 bis 4-000C, gegebenenfalls auch darüber, infolge der Ausbildung der Düsenstrahlen des eingespritzten Brennstoffs am äußeren schrägen Muldenrand auftritt. An dem korrespondierenden Teil der vom Kühlöl benetzten Innenwand des Kühlkanals können dann Temperaturen um 240 bis 27O°C entstehen, die sich durch gelbe bis blaue Anlauffarben auf der Stahloberfläche bemerkbar machen und bereits in der Nähe bzw. über dem Flammpunkt von handelsüblich verwendeten Schmierölen für Dieselmotoren liegen. Die Erfahrung mit solchen im 5 Betrieb befindlichen Kolben bestätigt gelegentlich die Vermutung, daß in dem genannten Bereich des Kühlkanals das Kühlöl sehr schnell verkokt und eine isolierende Ölkohleschicht bildet, die die Kühlwirkung in der Weise vermindert, daß die Temperaturen wesentlich erhöht und damit die Festigkeitswerte des Kolbenwerkstoffs absinken, der Kriechwiderstand verringert und die thermische Deformation erhöht werden. Dies kann, wie verschiedentlich beobachtet, zu bleibenden Verformungen führen. Diese ■ Erkenntnisse führten zur Konstruktion von Ölleitringen,As a rule, in such pistons a relatively flat combustion chamber recess in front, so that the highest surface temperature of over generally 350 to 4-00 0 C, if appropriate, also about of the injected fuel occurs due to the formation of the jets at the outer oblique bowl edge. On the corresponding part of the inner wall of the cooling duct that is wetted by the cooling oil, temperatures of around 240 to 270 ° C can arise, which are noticeable through yellow to blue annealing colors on the steel surface and are already close to or above the flash point of commercially used lubricating oils for diesel engines lie. Experience with such pistons in operation occasionally confirms the assumption that the cooling oil cokes very quickly in the mentioned area of the cooling channel and forms an insulating oil carbon layer, which reduces the cooling effect in such a way that the temperatures are significantly increased and thus the strength values of the Piston material drop, creep resistance is reduced and thermal deformation is increased. As has been observed on various occasions, this can lead to permanent deformations. These ■ findings led to the construction of oil guide rings,
130038/0229130038/0229
30Q833030Q8330
-js --js -
die den Ölstrom zu den heißesten Stellen führen, dort die Strömungsgeschwindigkeit erhöhen und die Oberflächentemperatur absenken (DE-OS 27 23 619).that lead the flow of oil to the hottest places, there increase the flow rate and lower the surface temperature (DE-OS 27 23 619).
Grundlegende Modelluntersuchungen am Kühl system gebauter Kolben haben nun gezeigt:, daß der größte Teil der Wärmemengen im oberen Teil der· Kühlraunihälf te , dagegen nennenswerte Wärmemengen im unteren Teil der KühlraumhäLfte jedoch nicht mehr übertragen werden. Das hat zur Folge, daß die Temperatur im Bereich des ersten Kolbenrings auf 110 bis 120 C absinkt und es zur unerwünschten Kondensation von S0„ und allen damit verbundenen Nachteilen, wie z.B. Korrosionserscheinungen, kommt. Im übrigen wird durch die hohe Wärmekonzentration mit Temperaturen von 300 bis 35O°C an der Bodenaußenfläche die Gestaltfestigkeit des Kolbens durch thermische Deformation beeinflußt.Basic model investigations built on the cooling system Pistons have now shown: that the greater part of the amount of heat in the upper part of the cooling chamber half, on the other hand, is worth mentioning Amount of heat in the lower part of the refrigerator compartment but can no longer be transmitted. This has the consequence that the temperature in the area of the first piston ring on 110 to 120 C and it leads to undesirable condensation of SO "and all the disadvantages associated with it, such as Signs of corrosion, comes. Otherwise, the high heat concentration with temperatures of 300 to 35O ° C on the bottom outer surface the structural strength of the piston influenced by thermal deformation.
Die Aufgabe der vorliegenden Erfindung besteht darin, bei dem eingangs beschriebenen Kolben eine Verbesserung der Kühlwirkung durch Absenken der Temperatur in den heißesten Bereichen des Kolbenoberteils und dc.bei gleichzeitig eine Vergleichmäßigung der Temperaturverteilung und damit Anhebung des Temperaturniveaus im Ringfeld des Kolbenoberteils zu erreichen.The object of the present invention is to improve the piston described above Cooling effect by lowering the temperature in the hottest areas of the upper part of the piston and, at the same time, a Uniformity of the temperature distribution and thus an increase in the temperature level in the ring area of the piston upper part to reach.
Die Lösung dieser Aufgabe besteht erfindungsgemäß in einer Beschichtung der Wand im Bereich des oberen Kühlraumteils mit einem hochwärmeleitenden Stoff, die vorzugsweise eine Dicke von mindestens 0,5 mm aufweist.According to the invention, this object is achieved in one Coating of the wall in the area of the upper part of the cold room with a highly thermally conductive material, which is preferably a Has a thickness of at least 0.5 mm.
Durch diese Maßnahme ergibt sich eine optimale Kühlwirkung, die sich insbesondere dadurch auszeichnet, daß ein wesentlicher Teil der bisher in einer begrenzten Oberfläche der oberen Kühlraumhälfte übertragenen Wärmemenge nunmehr vonThis measure results in an optimal cooling effect, which is characterized in particular by the fact that a substantial Part of the amount of heat previously transferred in a limited surface area of the upper half of the refrigerator compartment is now from
130038/0229130038/0229
der Oberfläche der gesamten oberen Kühlraumhälfte übertragen -wird, was zu einem entscheidenden Temperaturanstieg im Ringfeld und zu einer TemperaturabSenkung am Kolbenboden führt, so daß die Kondensation von SO,, im Ringfeld vermieden und die Gestaltfestigkeit des Kolbens nicht mehr beeinträchtigt wird. Weiterhin wird der Wirkungsgrad der Wärmeabfuhr über den Kühlkanal verbessert, so daß Oberfläche und Volumen des Kühlkanals bei gleicher Kühlwirkung verringert werden können.transferred to the surface of the entire upper half of the refrigerator compartment -will, leading to a decisive increase in temperature in the ring field and a decrease in temperature on the Piston crown leads, so that the condensation of SO ,, im Ring field avoided and the shape stability of the piston is no longer impaired. Furthermore, the efficiency of the heat dissipation via the cooling channel is improved, so that the surface and volume of the cooling channel can be reduced with the same cooling effect.
Die Erfahrung hat gezeigt, daß es zur Erzielung des gewünschten Effektes schon ausreicht, wenn lediglich der kolbenaußenseitige Bereich des oberen Kühlraumteils mit einem hochwärmeleitenden Stoff beschichtet ist.Experience has shown that it is sufficient to achieve the desired effect if only the Piston outside area of the upper refrigerator part with is coated with a highly thermally conductive material.
Im Rahmen der Ausgestaltung der Erfindung weist die Beschichtung eine durch Rippen vergrößerte, wärmeabführende Oberfläche auf, die von der Kühlflüssigkeit benetzt wird und den Wärmetransport erhöht.In the context of the embodiment of the invention, the coating has a heat-dissipating surface that is enlarged by ribs Surface that is wetted by the coolant and increases the heat transport.
Für die Beschichtung kommt vorzugsweise neben reinem Kupfer auch Aluminium bzw. deren Legierungen in Betracht.In addition to pure copper, aluminum or its alloys are preferably used for the coating.
Zweckmäßigerweise wird die hochwärmeleitende Schicht galvanisch abgeschieden oder im Verbundguß durch eine feste intermetallische Bindung mit dem Eisenwerkstoff verbunden.The highly thermally conductive layer is expediently deposited galvanically or in composite casting by a firm intermetallic bond connected to the ferrous material.
Es ist ebenso möglich, die Beschichtung mechanisch mit dem Kolbenoberteil zu verklammern oder zu verstemmen.It is also possible to mechanically clamp or caulk the coating to the upper piston part.
Eine Abwandlung der Erfindung besteht darin, daß die Beschichtung außenseitig im Bereich des Feuerstegs angebracht ist.A modification of the invention consists in that the coating is applied on the outside in the area of the top land is.
130038/0229130038/0229
— 5 —- 5 -
Die Erfindung wird im folgenden anhand von Ausführungsbeispielen näher erläutert:The invention is explained in more detail below with reference to exemplary embodiments:
Es zeigen:
Fig· 1 einen Querschnitt durch den Oberteil 1 einesShow it:
Fig. 1 shows a cross section through the upper part 1 of a
Kolbens 2 im Bereich des Kühlkanals 3, der mit einer aus Kupfer bestehenden, galvanisch abgeschiedenen Beschichtung 4 versehen ist.Piston 2 in the area of the cooling channel 3, which is electrodeposited with an existing copper Coating 4 is provided.
Fig. 2 einen Querschnitt durch den Oberteil 5 einesFig. 2 shows a cross section through the upper part 5 of a
Kolbens 6 im Bereich des Kühlkanals 7, der mit einer galvanisch aufgebrachten Beschichtung, die kolbenbodenseitig Rippen 8 aufweist, versehen ist.Piston 6 in the area of the cooling channel 7, which has a galvanically applied coating that Has ribs 8 on the piston bottom side, is provided.
Fig. 3, 4 einen Querschnitt durch die Oberteile 9, 10 eines Kolbens 11, 12 im Bereich des Kühlkanals 13, IM-, wobei der an den Feuersteg angrenzende Teil des Kühlkanals eine mit dem Oberteil mechanisch verklammerte Beschichtung 15, 16 aus Aluminium aufweist.3, 4 show a cross section through the upper parts 9, 10 of a piston 11, 12 in the region of the cooling channel 13, IM-, wherein the part of the cooling channel adjoining the top land is mechanically clamped to the upper part Coating 15, 16 made of aluminum.
Fig. 5 einen Querschnitt durch den mit einer mechanisch verklammerten, Rippen 17 aufweisenden Beschichtung 18 versehenen Oberteil 19 eines Kolbens 20 im Bereich des Kühlkanals 21.5 shows a cross section through the coating with a mechanically clamped, ribs 17 coating 18 provided upper part 19 of a piston 20 in the area of the cooling channel 21.
Fig. 6 einen Querschnitt durch den Oberteil 22 eines6 shows a cross section through the upper part 22 of a
Kolbens 23 im Bereich des Kühlkanals 24. Auf der Außenseite des Kühlkanals ist im Bereich des Feuerstegs 25 eine mechanisch verklammerte BePiston 23 in the area of the cooling channel 24. On the Outside of the cooling channel is a mechanically clamped Be in the area of the top land 25
schichtung 26 angeordnet.layering 26 arranged.
130038/0229130038/0229
-β'-β '
LeerseiteBlank page
Claims (7)
Beschichtung (26) außenseitig im Bereich des Feuerstegs (25) angebracht ist.5. modification of the piston according to one or more of claims 1 1 to H, characterized in that the
Coating (26) is attached on the outside in the area of the top land (25).
Kolbenoberteil verklammert oder verstemmt i.st.7. Piston according to claims 1 to 5, characterized g ekennzeichne t that the coating mechanically with the
Piston upper part clamped or caulked i.st.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803008330 DE3008330A1 (en) | 1980-03-05 | 1980-03-05 | LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES |
EP81200115A EP0035290B2 (en) | 1980-03-05 | 1981-01-30 | Liquid-cooled piston for internal-combustion engines |
DE8181200115T DE3161813D1 (en) | 1980-03-05 | 1981-01-30 | Liquid-cooled piston for internal-combustion engines |
JP3106181A JPS56138445A (en) | 1980-03-05 | 1981-03-04 | Fluid cooled piston for internal combustion engine |
US06/240,449 US4368697A (en) | 1980-03-05 | 1981-03-04 | Liquid-cooled piston for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803008330 DE3008330A1 (en) | 1980-03-05 | 1980-03-05 | LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3008330A1 true DE3008330A1 (en) | 1981-09-17 |
Family
ID=6096269
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803008330 Withdrawn DE3008330A1 (en) | 1980-03-05 | 1980-03-05 | LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES |
DE8181200115T Expired DE3161813D1 (en) | 1980-03-05 | 1981-01-30 | Liquid-cooled piston for internal-combustion engines |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8181200115T Expired DE3161813D1 (en) | 1980-03-05 | 1981-01-30 | Liquid-cooled piston for internal-combustion engines |
Country Status (4)
Country | Link |
---|---|
US (1) | US4368697A (en) |
EP (1) | EP0035290B2 (en) |
JP (1) | JPS56138445A (en) |
DE (2) | DE3008330A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008028197A1 (en) * | 2008-06-12 | 2009-12-17 | Mahle International Gmbh | Piston e.g. single-part cast piston, for internal combustion engine, has cooling channel running around piston crown at height of ring part, where surface of cooling channel includes circulating grooves that run parallel to each other |
DE102011119527A1 (en) * | 2011-11-26 | 2013-05-29 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
US20170107935A1 (en) * | 2015-10-14 | 2017-04-20 | Ford Global Technologies, Llc | Direct-injection internal combustion engine with piston, and method for producing a piston of an internal combustion engine of said type |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193043U (en) * | 1981-05-29 | 1982-12-07 | ||
JPS60153451A (en) * | 1984-01-23 | 1985-08-12 | Izumi Jidosha Kogyo Kk | Piston for internal-combustion engine |
DE3403624A1 (en) * | 1984-02-02 | 1985-08-08 | Kolbenschmidt AG, 7107 Neckarsulm | BUILT LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES |
US5040454A (en) * | 1988-10-21 | 1991-08-20 | Caterpillar Inc. | Piston assembly and piston member thereof having a predetermined compression height to diameter ratio |
US6393828B1 (en) † | 1997-07-21 | 2002-05-28 | General Electric Company | Protective coatings for turbine combustion components |
EP1222364B2 (en) | 1999-10-08 | 2018-03-28 | Federal-Mogul Corporation | Dual gallery piston |
US7077077B2 (en) * | 2001-07-06 | 2006-07-18 | A.I.M.L. Gmbh | Coolable annular support for intentionally cooled piston rings and method for the production thereof |
DE10134293B4 (en) * | 2001-07-14 | 2009-06-04 | Mahle Gmbh | Cooled ring carrier for a piston |
US6532913B1 (en) * | 2001-11-27 | 2003-03-18 | Caterpillar Inc | Piston cooling fin |
DE10244511A1 (en) * | 2002-09-25 | 2004-04-15 | Mahle Gmbh | Multi-part cooled piston for an internal combustion engine |
EP1457641A1 (en) * | 2003-03-11 | 2004-09-15 | Siemens Aktiengesellschaft | Method for cooling a hot gas guiding component and component to be cooled |
DE102006030699B4 (en) * | 2006-06-30 | 2014-10-02 | Daimler Ag | Cast steel piston for internal combustion engines |
DE102007050214A1 (en) * | 2007-10-20 | 2009-04-23 | Mahle International Gmbh | Piston for an internal combustion engine |
US8863647B2 (en) * | 2011-05-04 | 2014-10-21 | GM Global Technology Operations LLC | Oil gallery piston with improved thermal conductivity |
DE102012211440A1 (en) | 2011-10-21 | 2013-04-25 | Mahle International Gmbh | piston |
US9169800B2 (en) * | 2011-11-28 | 2015-10-27 | Federal-Mogul Corporation | Piston with anti-carbon deposit coating and method of construction thereof |
DE102012014192A1 (en) * | 2012-07-18 | 2014-01-23 | Mahle International Gmbh | Piston e.g. single-part piston for e.g. diesel engine of passenger car, has cooling passage provided with passage wall adjacent to ring portion, and annular component provided in region of wall and comprising edge that projects into passage |
DE102012014200A1 (en) * | 2012-07-18 | 2014-05-15 | Mahle International Gmbh | Piston for internal combustion engine, has cavity that is made of low melting metal or metal alloy and is provided adjacent to combustion bowl, for receiving coolant in circulating cooling passage of piston head |
DE102012216925A1 (en) | 2012-09-20 | 2014-03-20 | Mahle International Gmbh | Method for producing an oil-cooled machine part |
WO2014059221A1 (en) * | 2012-10-12 | 2014-04-17 | Mahle International Gmbh | Piston with cooling gallery and cooling gallery fins |
KR20160146925A (en) * | 2014-04-30 | 2016-12-21 | 페더럴-모걸 코오포레이숀 | Steel piston with filled gallery |
JP2018508691A (en) * | 2015-01-30 | 2018-03-29 | フェデラル−モーグル・リミテッド・ライアビリティ・カンパニーFederal−Mogul Llc | Piston with cooling cavity cooling insert and method of construction |
US10731598B2 (en) * | 2018-10-18 | 2020-08-04 | Tenneco Inc. | Piston having an undercrown surface with coating and method of manufacture thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB309537A (en) * | 1929-03-13 | 1930-04-17 | Weiss Johann | Improvements in and relating to pistons for internal combustion engines |
US2833668A (en) * | 1954-06-10 | 1958-05-06 | John Altorfer | Method of bonding aluminum to a metal |
US2772933A (en) * | 1955-06-22 | 1956-12-04 | Alco Products Inc | Pistons |
SE342273B (en) * | 1965-09-23 | 1972-01-31 | Svenska Flaektfabriken Ab | |
US4083292A (en) * | 1976-06-16 | 1978-04-11 | Caterpillar Tractor Co. | Piston with high top ring location |
DE2723619C2 (en) * | 1977-05-25 | 1984-10-04 | Karl Schmidt Gmbh, 7107 Neckarsulm | Multi-part, liquid-cooled pistons for internal combustion engines |
-
1980
- 1980-03-05 DE DE19803008330 patent/DE3008330A1/en not_active Withdrawn
-
1981
- 1981-01-30 DE DE8181200115T patent/DE3161813D1/en not_active Expired
- 1981-01-30 EP EP81200115A patent/EP0035290B2/en not_active Expired
- 1981-03-04 JP JP3106181A patent/JPS56138445A/en active Pending
- 1981-03-04 US US06/240,449 patent/US4368697A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008028197A1 (en) * | 2008-06-12 | 2009-12-17 | Mahle International Gmbh | Piston e.g. single-part cast piston, for internal combustion engine, has cooling channel running around piston crown at height of ring part, where surface of cooling channel includes circulating grooves that run parallel to each other |
DE102011119527A1 (en) * | 2011-11-26 | 2013-05-29 | Mahle International Gmbh | Piston for an internal combustion engine and method for its production |
US20170107935A1 (en) * | 2015-10-14 | 2017-04-20 | Ford Global Technologies, Llc | Direct-injection internal combustion engine with piston, and method for producing a piston of an internal combustion engine of said type |
US10436147B2 (en) * | 2015-10-14 | 2019-10-08 | Ford Global Technologies, Llc | Direct-injection internal combustion engine with piston, and method for producing a piston of an internal combustion engine of said type |
Also Published As
Publication number | Publication date |
---|---|
EP0035290A1 (en) | 1981-09-09 |
US4368697A (en) | 1983-01-18 |
EP0035290B1 (en) | 1984-01-04 |
EP0035290B2 (en) | 1989-06-21 |
DE3161813D1 (en) | 1984-02-09 |
JPS56138445A (en) | 1981-10-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0035290B1 (en) | Liquid-cooled piston for internal-combustion engines | |
EP0136741B1 (en) | Piston for internal-combustion engines | |
DE3116475C2 (en) | Pistons for an internal combustion engine | |
DE3403624A1 (en) | BUILT LIQUID-COOLED PISTON FOR INTERNAL COMBUSTION ENGINES | |
DE2723619C2 (en) | Multi-part, liquid-cooled pistons for internal combustion engines | |
DE102011115826A1 (en) | Piston for an internal combustion engine | |
DE102007050213A1 (en) | Piston for an internal combustion engine | |
EP0019323A1 (en) | Piston for internal-combustion engines | |
WO2006056315A1 (en) | Piston with a lightweight construction that is subjected to high thermal stress | |
WO2013156442A1 (en) | Piston for an internal combustion engine | |
DE4118400A1 (en) | BUILT OIL-COOLED PISTON FOR DIESEL ENGINES | |
EP0000592A1 (en) | Cooled piston for an internal-combustion engine and method for producing same | |
DE1955140A1 (en) | Fluid-cooled cylinder liner for internal combustion engines | |
DE3442488A1 (en) | LIQUID-COOLED PISTON COMBUSTION ENGINE WITH CYLINDERS ARRANGED IN ROW | |
DE19548811A1 (en) | Plunger with cooling channel | |
EP0520536B1 (en) | Assembled, oil cooled piston for Diesel engines | |
DE3508405A1 (en) | Internal combustion engine with reduced noise and heat emission | |
DE7212560U (en) | Heavy metal ring carrier for pistons | |
EP0483134B1 (en) | Internal combustion engine | |
DE102007050214A1 (en) | Piston for an internal combustion engine | |
AT1621U1 (en) | INTERNAL COMBUSTION ENGINE | |
DE2940814C2 (en) | Water-cooled reciprocating internal combustion engine | |
DE102012022906A1 (en) | Piston for internal combustion engine, has piston head, which has circumferential ring section with piston rings, where running surfaces of piston rings are partially provided with coating based on chromium nitride | |
DE3842321A1 (en) | PISTON WITH OIL COOLING FOR INTERNAL COMBUSTION ENGINES | |
DE2106634A1 (en) | Graphite wall continuous casting mould - with a metal skin |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8130 | Withdrawal |